{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["event", "astronomical object", "organization", "animal", "location", "mythical figure"], "input": "The most common chromosomal aneuploidy is a trisomy of chromosome 21 which manifests itself as Down syndrome ."}
{"event": [], "astronomical object": [], "organization": [], "animal": [], "location": [], "mythical figure": []}